Gas-compressor.



C. R. NEESON.

GAS COMPRESSOR.

APPLICATION FILED MN. 5. 19:7.

l ,99,2 L Patente@ Apr. 1, 1919.

union.

CHARLES B. N'EESON, OF NEW ROCHELLE, NEW YORK, ASSIGNOR TO DE LA VERGNEMACHINE COMPANY, OF NEW YORK, N. Y., A. CORPORATION OF NEW YORK.

GAS-COMPRESSOR.

Specification of Letters Patent.

Patented npr. i, asie.

Application filed January 5, 19.17. Serial No. 140,678.

1 ganization and the arrangement of parts in reciprocating compressorsfor ammonia gas and1 other fluids, enabling such apparatus to operate athigh speed and with high volumetric eiciency and affording otheradvantages as hereinafter made apparent In the accompanying drawings:

Figure 1 is a general longitudinal section through the cylinder of anexample and preferred form of the compressor;

Fig. 2 is a cross section on line II-II;

and

Fig. 3 a cross section on line III--IIIof Fi l.

'Ille compressor cylinder l is closed at both ends by `separate attachedheads 2 each of which projects into the cylinder and is appropriatelycooled by circulation of water in its interior spaces. The piston 3, isdouble-acting and about one-half the length of the cylinder, and isreciprocated by its piston rod from a crank driven cross-head 4, and itsstroke is such that it approaches close to the inner faces of thecylinder heads at the end of its motion in each direction, thus workingwith a very slight clearance. The inlet ports 5 are disposed on the sameside and at opposite ends of the cylinder 1, being in the present caseon the upper side, and lthey overlap Athe junction of the cylinder headswith the cylinder so that their central axes 'thus approximatelycoincide with the clearance spaces at each end. In these positions theyare partly overrun by the piston, as indicated in the drawing, and theinwardly projecting parts of the cylinder heads directly opposite theopenings are cut away as shown at 6 to avoid obstructing the inward flowfrom the ports.

The outlet ports 7 are similarly disposed in the opposite or lower sideof the cylinder, each being thus well removed from its cooperatingsuction port. The valve members proper are marked 8, and are desirablyof the plate, or thin disk type, as indicated so as to have the leastpossible inertia, the inlet valves of course opening inwardly and theoutlet valves outwardly. There are one or more intake and one or moreoutlet valves at each end of the cylinder, all centered to the clearancespace, thus utilizing the full circumference of the clearance space andproviding for the minimum valve resistance to the iniowing gas.Theammonia to be compressed enters through the induction pipe 9 into thesuction space or gas passage 10 formed between the upper side of thecylinder and a surrounding casing wall 11. This passage serves toconduct the gas to the suction valves at both ends. Midwa between thesuction valve ports 5 and pre erably in line with the induction pipe 9,as shown the cylinder l is provided with a transverse or annular row ofadditional inlet ports 12 uncovered by the piston when at the extremelimit of its stroke in both direc'- tions, and the gas is admitted tosuch ports from the passage 10 through lateral branches 13 of thelatter. It will be noted that the cylinder proper and the surroundingwall members forming the suction passage and its branches above referredto are formed as a single casting although that could obviously beotherwise.

During the initial part of the suction stroke, the gas is drawn into thecompressor cylinder through the suction valves at one end or the otherand thereby a forward vsurge of gas is produced in the induction pipe 9which is maximum at about the middle of the suction stroke or where thecrankdriven piston is moving at its maximum ve- Vinder therethroughunder the effect of its momentum. The said auxiliary ports aretherefore, disposed directly opposite the outlet of the induction pipe9, as above described and the latter though not fully illustrated isarranged to lead straight, or with easy curves, to the said suctionspace 10, so that the forward rush of gas may push as much as possibleinto the cylinder Ithereby increasing the density of the charge drawn inand consequently enhancing the ensuing compression. The additionalamount of gas thus introduced encounters less resistance to entrancethan the main part of the sucked in charge, since it does not have toovercome the resistance of the valve springs and for the same reasonthesuction valves are perto the other parts to accomplish this result.`

An appropriate speed for the design shown is 200 crank revolutions perminute.

The outletvalves 7 discharge into a common4` outlet space 14 formedbetween the under side of the cylinder and a jacket wall l5 andthe gasis `led therefrom through the force pipe 16 to the condensers or otherplace A'of use. The outletspace 14 is formed also,

inone piece with the cylinder as in the case ofthe suction space l0. Thelower part of the compressor cylinder, and outlet space especially atthe ends, is arranged lto be cooled' by the circulation of water in anyIdesirable way through the heads` and side wall, the detail of thecirculating passages being, however, unimportant to thepresent inventionand therefore not specially illustrated.

Claims: 1. Areciprocating gas compressor, comprising in combination withthe cylinder, pisto-n, normal suction valve and induction pipe to supplythe same and an auxiliary inlet port also supplied fromsaid pipe andthrough which auxiliary port an additional charge of gas is deliveredinto the cylinder, this extra charge moving-into the cylinder underuthemomentum imparted to it by the suction stroke of the piston, asdistinguished from a suction charge.

2. A gas compressor comprising a cylinder with removable cylinder headsand a suction valve disposed at the junction of the cylinder and thehead, in part overlying the head and in part overrun by the piston, incombination with an auxiliary inlet port uncovered by the piston at theend ot its suction stroke and an induction pipe supplying said valve andinlet port.

3. In a gas compressor, a compressor cylinder, a suction valve leadingthereto and partly overrun by the piston, and an inlet port uncovered bythe piston at the end of its suction stroke, in combination with asuction space extending alongside the cylinder and supplying saidsuction valve and inlet port.

4. Afdouble acting gas compresso-r comprising a cylinder having suctionvalves at its opposite ends and auxiliary inlet ports at its middle, incombination with a piston arranged to partly overrun said valves and touncover said inlet ports at the ends of its suction stroke in bothdirections and an induction pipe supplying both said valves and saiduncovered ports.

A gas compressor comprising a compressor cylinder with suction valvesdisposed on the same side thereof and at its ends and having dischargevalves disposed at the opposite side and at the ends, all of said valvesbeing partly overrun by the pistonin its compression stroke, inlcombination With auxiliary inlet ports uncovered by the piston at theend of its suction stroke, and a single induction pipe supplying saidsuction valves and auxiliary inlet ports.

6. A compressor for ammonia gas, comprising in combination with thecylinder and piston, the normal suction valve and an auxiliary inletport, both connected to the same gas receiving space, and an inductionpipe connected to said space, whereby the forward surge of gas iowinginto the cylinder by way of the suction valve will force l some of thegas intothe cylinder through the auxiliary inlet port. n

7. A compressor for ammonia gas, comprising in combination with thecylinder and piston, the normal suction valve and an auxiliary inletport, both connected to the same gas receiving space, and an inductionpipe connected to said space whereby the gas in passing to the suctionvalve will How over the said auxiliary inlet port, said port beingopened near the end of the stroke of the piston to admit a charge of gasto the cylinder in addition to the charge admitted by way ot' theysuction valve.

ln testimony whereof, I have signed this speciication.

CHARLES R. NEESON.

Genies of this patent may be obtained for ave cents each, by addressingthe "Commissioner of Patente, Washington, D. C.

